A sample of nine bright Seyfert 1 and NELG type galaxies, observed
with BeppoSAX, is analyzed to assess on a truly broad band basis (0.1–200 keV)
the issue of the spectral contributions of Compton reflection and iron line
fluorescence from circumnuclear gas. The empirical description adopted for the
direct continuum is the commonly used power law with an exponential cut–off.
The most direct test of the theoretical
predictions, namely that the equivalent width of the line, , and
the strength R of the
reflection relative to the direct continuum
are closely related to each other, gives a substantially positive result, that is
their mean ratio is very close to expectation, and only a modest spread in the iron
abundance seems implied. The existence of a steep correlation between R and
the slope Γ of the power law is not confirmed. A weak evidence is found
that the existence of a very shallow trend to increase on average with Γ
cannot be altogether excluded in both R and , but needs to be tested
with a larger sample. The energy Ef in the exponential cut–off spans a range
from about 80 to more than 300 keV. A possible correlation is found, with Ef
increasing on average with Γ: if ignored, for instance by keeping Ef
at a fixed value in a sample study, it could be cause of artificial
steepening in a correlation between R and Γ.

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